THE CLINICAL SIGNIFICANCE OF PERCENT FREE PSA IN DIFFERENTIATING PROSTATE CANCER AND BENIGN PROSTATE HYPERPLASIA

摘要

Objective To evaluate using prostate specific antigen (PSA) and percent free PSA(fPSA) for the diagnosis of prostate cancer(Pca) and benign prostate hyperplasia(BPH). Methods 315 men with BPH and 55 men with Pca were randomly chosen, serum fPSA and total PSA were determined by ELISA and then we compared the sensitivity and specificity of PSA and percent fPSA for the diagnosis of Pca. Results While using PSA and percent fPSA for the diagnosis of prostate cancer, the sensitivity was similar (89. 8% vs. 94. 5% , P>0. 05), but the specificity was signifi-canty different (52. 7% vs. 89. 8%, P<0. 005). Conclusions Using percent fPSA might decrease false-positive and avoid 37.1% negative biopsies as compared with PSA, it is very valuable for the diagnosis of Pca.